A study of the ultrastructure of developing human umbilical vessels.
J Anat
; 188 ( Pt 1): 75-85, 1996 Feb.
Article
en En
| MEDLINE
| ID: mdl-8655418
ABSTRACT
Electron microscopic techniques were used to examine the ultrastructure of developing human umbilical arteries and vein (8-12, 13-17 and 37-40 wk gestational age). These showed that with increasing age there is (1) an increase in the size of the lumen and the thickness of the media; (2) an increase in the ratio of contractile smooth muscle phenotypic cells; (3) an increase in the myofilament content of the smooth muscle cells and the number of Weibel-Palade bodies; (4) a decrease in the glycogen content; (5) an appearance of microvilli on the luminal surface of the endothelium. Lipid vesicles, nerves and vasa vasorum were not observed in any region of the umbilical vein or arteries.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Arterias Umbilicales
/
Venas Umbilicales
Idioma:
En
Revista:
J Anat
Año:
1996
Tipo del documento:
Article